Report Summary

  • 30

    Performance

    Renders faster than
    51% of other websites

  • 90

    Accessibility

    Visual factors better than
    that of 76% of websites

  • 83

    Best Practices

    More advanced features
    available than in
    57% of websites

  • 76

    SEO

    Google-friendlier than
    35% of websites

szdc.cz

Hlavní stránka - www.spravazeleznic.cz

Page Load Speed

17.1 sec in total

First Response

1.9 sec

Resources Loaded

15 sec

Page Rendered

175 ms

szdc.cz screenshot

About Website

Click here to check amazing Szdc content for Czech Republic. Otherwise, check out these important facts you probably never knew about szdc.cz

Visit szdc.cz

Key Findings

We analyzed Szdc.cz page load time and found that the first response time was 1.9 sec and then it took 15.2 sec to load all DOM resources and completely render a web page. This is a poor result, as 90% of websites can load faster.

Performance Metrics

szdc.cz performance score

30

Measured Metrics

name

value

score

weighting

FCP (First Contentful Paint)

Value8.4 s

0/100

10%

LCP (Largest Contentful Paint)

Value11.2 s

0/100

25%

SI (Speed Index)

Value11.2 s

5/100

10%

TBT (Total Blocking Time)

Value630 ms

47/100

30%

CLS (Cumulative Layout Shift)

Value0.001

100/100

15%

TTI (Time to Interactive)

Value14.8 s

8/100

10%

Network Requests Diagram

index.html

1900 ms

basic2.css

2044 ms

index.css

1711 ms

flowplayer.js

1928 ms

jquery.js

2087 ms

Our browser made a total of 45 requests to load all elements on the main page. We found that 96% of them (43 requests) were addressed to the original Szdc.cz, 4% (2 requests) were made to Google-analytics.com. The less responsive or slowest element that took the longest time to load (8.4 sec) belongs to the original domain Szdc.cz.

Page Optimization Overview & Recommendations

Page size can be reduced by 190.6 kB (27%)

Content Size

714.7 kB

After Optimization

524.1 kB

In fact, the total size of Szdc.cz main page is 714.7 kB. This result falls beyond the top 1M of websites and identifies a large and not optimized web page that may take ages to load. 25% of websites need less resources to load. Images take 552.2 kB which makes up the majority of the site volume.

HTML Optimization

-84%

Potential reduce by 23.2 kB

  • Original 27.7 kB
  • After minification 18.1 kB
  • After compression 4.6 kB

HTML content can be minified and compressed by a website’s server. The most efficient way is to compress content using GZIP which reduces data amount travelling through the network between server and browser. This page needs HTML code to be minified as it can gain 9.7 kB, which is 35% of the original size. It is highly recommended that content of this web page should be compressed using GZIP, as it can save up to 23.2 kB or 84% of the original size.

Image Optimization

-15%

Potential reduce by 84.0 kB

  • Original 552.2 kB
  • After minification 468.2 kB

Image size optimization can help to speed up a website loading time. The chart above shows the difference between the size before and after optimization. Obviously, Szdc needs image optimization as it can save up to 84.0 kB or 15% of the original volume. The most popular and efficient tools for JPEG and PNG image optimization are Jpegoptim and PNG Crush.

JavaScript Optimization

-55%

Potential reduce by 54.0 kB

  • Original 98.7 kB
  • After minification 96.4 kB
  • After compression 44.7 kB

It’s better to minify JavaScript in order to improve website performance. The diagram shows the current total size of all JavaScript files against the prospective JavaScript size after its minification and compression. It is highly recommended that all JavaScript files should be compressed and minified as it can save up to 54.0 kB or 55% of the original size.

CSS Optimization

-82%

Potential reduce by 29.4 kB

  • Original 36.0 kB
  • After minification 28.0 kB
  • After compression 6.6 kB

CSS files minification is very important to reduce a web page rendering time. The faster CSS files can load, the earlier a page can be rendered. Szdc.cz needs all CSS files to be minified and compressed as it can save up to 29.4 kB or 82% of the original size.

Requests Breakdown

Number of requests can be reduced by 18 (41%)

Requests Now

44

After Optimization

26

The browser has sent 44 CSS, Javascripts, AJAX and image requests in order to completely render the main page of Szdc. We recommend that multiple CSS and JavaScript files should be merged into one by each type, as it can help reduce assets requests from 6 to 1 for JavaScripts and as a result speed up the page load time.

Accessibility Review

szdc.cz accessibility score

90

Accessibility Issues

Contrast

These are opportunities to improve the legibility of your content.

Impact

Issue

High

Background and foreground colors do not have a sufficient contrast ratio.

Names and labels

These are opportunities to improve the semantics of the controls in your application. This may enhance the experience for users of assistive technology, like a screen reader.

Impact

Issue

High

Image elements do not have [alt] attributes

Best Practices

szdc.cz best practices score

83

Areas of Improvement

Trust and Safety

Impact

Issue

High

Does not use HTTPS

High

Includes front-end JavaScript libraries with known security vulnerabilities

Low

Ensure CSP is effective against XSS attacks

General

Impact

Issue

Low

Detected JavaScript libraries

SEO Factors

szdc.cz SEO score

76

Search Engine Optimization Advices

Crawling and Indexing

To appear in search results, crawlers need access to your app.

Impact

Issue

High

Links are not crawlable

Content Best Practices

Format your HTML in a way that enables crawlers to better understand your app’s content.

Impact

Issue

High

Image elements do not have [alt] attributes

Mobile Friendly

Make sure your pages are mobile friendly so users don’t have to pinch or zoom in order to read the content pages. [Learn more](https://developers.google.com/search/mobile-sites/).

Impact

Issue

High

Document uses legible font sizes

High

Tap targets are not sized appropriately

Language and Encoding

  • Language Detected

    CS

  • Language Claimed

    N/A

  • Encoding

    UTF-8

Language claimed in HTML meta tag should match the language actually used on the web page. Otherwise Szdc.cz can be misinterpreted by Google and other search engines. Our service has detected that Czech is used on the page, and neither this language nor any other was claimed in <html> or <meta> tags. Our system also found out that Szdc.cz main page’s claimed encoding is utf-8. Use of this encoding format is the best practice as the main page visitors from all over the world won’t have any issues with symbol transcription.

Social Sharing Optimization

Open Graph description is not detected on the main page of Szdc. Lack of Open Graph description can be counter-productive for their social media presence, as such a description allows converting a website homepage (or other pages) into good-looking, rich and well-structured posts, when it is being shared on Facebook and other social media. For example, adding the following code snippet into HTML <head> tag will help to represent this web page correctly in social networks: